laughlin



(No ModeL) 2 Sheets-Sheet 1.

S. J. LAUGHLIN 82 J. HOUGI-I. DRAWING, SKETGHING, AND DESIGNING TABLE.

No. 543,492. Patented July 80, 1895.

Mil/265565. fizllzlors.

(No Model.) 2 Sheets-Sheet 2 S. J. LAUGHLIN & J. HOUGH. DRAWING,SKBTUHING, AND DESIGNING TABLE. No. 543,492.

IIIIIVIIIIIIHYIHIIIIIIIIII'IIII Patented Jul Wilnesses.

l-UNrTno STATES PATENT Erica.

SAMUEL JOHN LAUGHLIN AND JAMES HOUGH, OF GUELPH, CANADA.

DRAWING, SKETCHING, AND DESIGNING TABLE.

SPECIFECATION forming part of Letters Patent No. 543,492, dated July 30,1895.

Application filed July 17,1894. Serial No. 517,836. (No model.) Patentedin Canada September 13, 1894, No. 46,973.

To all whom it may concern:

Be it known that we, SAMUEL JOHN LAUGH- LIN and JAMES HOUGH, of thecityof Guelph, in the county of Wellington, in the Province of Ontario,Canada, have invented certain new and useful Improvements in Drawing,Sketching, and Designing Tables, of which the following is aspecification.

This invention has been patented to us in the Dominion of Canada underdate September 13, 1894., No. 46,973.

Our invention relates to improvements in drawing, sketching, anddesigning tables; and the object of the invention is to design such atable as can be readily manipulated by the draftsman in order torapidly, accurately, and easily make any desired class of drawings; andit consists, essentially, of a table provided with a circular openingwith a protracting scale extending, preferably, half-way around the edgeof the same and within which is supported a circular board, means beingprovided for holding the paper on the board, controlling the rotationand position of the same, and a rule peculiarly controlled beingarranged to be moved across the board at will with or without referenceto peculiarly adapted movable or adjustable scales, as hereinafter moreparticularly explained.

Figure 1 is a perspective viewof our drawing-table with a portion of theboard broken away to exhibit the peculiarities of construction. Fig. 2is a plan view of the table. Fig. 3 is a side sectional elevationthrough the linesocyandyz,Fig.2. Figxlisadetailofthe drawing-board. Fig.5 is a detail showing means of fastening the controlling-cord to theadjustable rule and catch. Fig. 6 is a detail of the copy-holder.

In the drawings like letters of reference indicate corresponding partsin each figure.

A is the drawing-table provided with a circular opening a and cross-barsA.

A are brackets secured beneath the two central cross-bars.

B is a spindle, which extends through the brackets A and the enlargedtop 0 of the adjustable standard 0. The standard 0 is held in cross-barsD, connecting the supporting-standards D, which are flared out at thebottom to provide a stable base.

E is a screw-spindle provided with a handwheelE. The screw-spindle issecured at the bottom in the bracket 01', forming part of the cross-barD, and extends through a threaded hole made in the bracket 0, attachedto the standard C. It will thus be seen that by manipulating thehand-wheel the height of the table may be changed to suit the draftsman.

F F are two stays pivotally connected at the top to the front end of thecentral crossbars A A, and having slots finade in the lower portion ofthe stays, through which ex tends the screw (1, provided with thumb-nutsd By loosening the thumb-nuts d the position or incline of the table Amay be varied to any desired slant.

G is a circular board, which is preferably raised slightly above thelevel of the table A and is provided with a central plate g, in which ismade a square hole g, directly in the center of the board.

h is a spindle journaled in the bars H, extending between the centralcross-bars A, centrally between the front and rear sides of the board.The top h of the spindle is square and fits within the square hole gmade in the plate g. Between the plates H H, upon the spindle h, issecured a pulley I.

- 7; i are guiding-pulleys, which are loose on the spindle 2", extendingbetween the central cross-bars A A.

J is a chain,which is secured to and passes around the pulley over theguiding-pulleys 'i 6, down to the pedals k, which are hinged to thefront cross-bar K, secured-to the bottom of the standards D D.

a is a protractor preferably formed ofcelluloid around the nearer-edgeand half of the circular hole a. The protractor is divided into a scaleof ninety degrees from each side of the zero-point, which is oppositethe center of the front of the table.

The board G is supported upon frictionrollers 9 and is provided with apointer g, which is normally directly opposite the zeropoint in theprotractor, and has also a catch 9 extending from the edge thereof. Thecatch 9 is designed to be brought alternately into contact with eachpivoted stop L, when thrown in the position shown in Figs. 1 and 2. Theedges of the stops with which the catch comes in contact are exactlyninety degrees apart, so that when the board is swung around by pressingon one or other of the pedals one position of such board is exactly atright angles to the other. The outer ends of the stops L are providedwith knobs Z and abut the adjustable screw-pins Z, which extend throughthe blocks Z secured to the top of the table A. By means of thesescrew-pins the contact edges of the pivoted stops L may be trued to anexact distance of ninety degrees. Stop-pins Z are also provided to limitthe movement of the stops L in the opposite direction, as indicated bydotted lines in Fig. 2, when desired to rotate the board freely.

M is a clamp, which is secured to a block 021, hinged at m to the backof the table.

m is a spring extending between the block m and the back of the table A.

The clamp M extends over the edge of the circular board G, and has ascrew-pin n extending through a hole in it from the table A. The knob Nis provided, which is screwed onto the top of the pin a, and is designedto bring the clamp to press against the board G, so as to hold it in anyposition to which it may be rotated. Immediately upon the knob beingloosened, however, the spring 072 will force the clamp upwardly from theboard G and allow it to be rotated to any position desired.

The circular board G is provided with areshaped clasps O, which arepivoted at o and fit down upon the retaining bent pins 0, so as to graspthe turned-down edge of the draw ing paper or card between the clasp andthe edge of the board.

It will be seen that by manipulating the pedal and placing the pointer gin the position shown in dotted lines the drawing-paper is set with itsedge at an angle to the sides of the table, and consequently lines maybe drawn on the same at an angle to its edges, (in this instance theangle being thirty degrees) arule or rules being employed for thispurpose, which rules we shall now describe.

The rule P is'provided with an upwardlyextending tongue 19, which fitsinto a groove q in the scale-marked rule, so as to permit of itslongitudinal adjustment upon the rule P and yet hold it perfectlyparallel and connected with same.

13 are downwardly-extending blocks secured to the bottom of the rule P.The block 1) at the left-hand side of Fig. 2 extends through a slot awhich is made in the end A which is substantially flush with the surfaceof the board G. The other block 19 at the opposite end of the boardextends down at the outside edge of the board. Each of the blocks 1) hassecured to it by a screw 19 the endless cord R, which extends over thefront and back grooved pulleys r and 0" and is wound around a centralpulley r which is journaled on the outer end of the central spindle 13,which is journaled at its outer end in the bearing-block A. The pulley ris shown in dotted lines, so as to exhibit means whereby it is adjustedso as to tighten or slacken the cord B. This means consists of the thumbscrew r which extends through the head portion A of the table and theslot 0" into the plate 1* to the inside of a slot 4- of thebearing-block T in which the pulley v" is placed. The other pulleyr isjournaled in a slot 0' in the bearing-block 7'.

Within the slot a in the end A, we journal a rotatable longitudinallyscale notched and grooved bar S, the notches being ratchelshaped and cuton the strips between the longitudinal grooves S which are arrangedalternately with the strips S. The scale-marked notches are varied as todistances apart from one thirty-second or even less to any desired size.On the outer end of the spindle .5 of the bar S is secured a collar .9on which is indicated opposite the strips S the particular scale of eachstrip. The turning-knob s is secured on the end of the spindle, so as toenable any desired scale on the collar 5 tohe turned opposite thepointer S. In order to insure all the points 01' the collar being heldsecurely opposite the pointer, we provide a toothed wheel 5 which isengaged by a springdog 3. The top of the collar 3 and bar S arenecessarily below the level of the top of the end A The bar S is shownin the drawings with one of the grooves S opposite the pointer.

13 is a catch-tooth secured in the bottom of the rule P. (See full linesin Fig. 5 and dot ted lines in Fig. 2. The catclrtooth 1) has one edgeslanting, so that it will readily slide downwardly or to the front ofthe table over the correspondingly-formed ratchet-shaped notches in thestrips 8* of the bar S. In cross sectioning or other similar work indrawing it will be seen that any desired distances may be equally spacedvery expeditiously. The rule P is of course moved back along the bar S,preferably by raising the handle 13". At the right-hand side of theboard is another raised end A which is substantially flush with theboard, and is provided with a longitudinal recess a in which is fittedthe scale A", which is adjustable by means of a thumbserew a, extendingthrough the front end of the board. By means of this adjustable scale Awe are enabled, it we have a certain line on the paper, to adjust thescale so as to bring a definite point onit directly opposite theline andthen set off from this line any number of equal distances.

In order to provide for the holding of a copy we provide a holder T,which is provided with restst and swiveled spring-fingers t, and is heldto the table by the forwardly-extending bars i securedto the back of theholder and fitting within sockets a secured to the bottom of the rearend of the table. (See Figs. 1 and 6.) We also provide aninstrumentholder U, which is provided with a raised edge u and acentrallydocated sleeve a, secured to the bottom of it. Theinstrument-holder U is supported upon a rod V, which extends throughthe'sleeve u, and is secured in any desired position in the rod by theset-screw u The inner end of the rod is squared at the top and fitsbeneath the cross-bars A, to which it is held by the cleats '0. (Seedotted lines, Fig. 1, and full lines, Fig. 3.) The instrument-holder Uis also provided with legs M, which extend below the bottom ofthe-sleeve u, so that when it is removed from the rod it will rest levelupon any table upon which it may be placed.

It will be seen from the construction of the table hereinbeforedescribed that it is extremely simple and cheaply made and has a minimumnumber of parts, to enable the draftsman to conveniently, accurately,and rapidly accomplish any desired adjustment for any class of work.

WVhat we claim as our invention is 1. In a drawing table, thecombination with the table A having a circular opening, of a removablecircular drawing board, a square socket in the center of the bottomthereof, a spindle with a square head fitting into the socket, means forrotating the spindle, and cross bars secured to the under side of thetable and extending beneath the opening and friction rollers journaledin the cross bars and forming the supports for the board, substantiallyas described.

2. The combination with a circular drawing board, G, of the arc-shapedclasps, O, piv- .oted at, 0, on the edge of the board and designed tofit between thebent retaining pin, 0, and the edge of the board over theturned down corner of the paperas and for the purpose specified.

3. The combination with a drawing table having a circular opening and acircular drawing board within such opening, of a spindle, 7t, journaledin the bars, H, H, extending between the central cross bars, A, A, andhaving a square upper end extending into corresponding hole in the plateat the bottom of the board, a pulley, I, on the spindle h, guidingpulleys, 'i, t', on the spindle, 2", extending between the cross bars, achain secured to the pulley, Land extending over the guiding pulleys, t,'i, the lower end of the chain being connected to the forward end of thepedals, 7c, and the cross bar, K, secured to the lower portion of thestandard and extending out each way and having the pedals hinged to itas and for the purpose specified.

4. The combination with a table provided with a circular opening and acircular board supported within the opening with its surface above thelevel of the table and provided with a catch, 9 in its edge and meansfor rotating the table, of stops adjustablyheld at each side and withinthe sweep of the catch, the stops being located at approximately ninetydegrees apart so as to permit of a ninety degree swing to the board asand for the purpose specified.

5. The combination with a table provided having a circular opening, of acircular drai ing board having the surface extending above the table,and a pivoted spring clamp secured at the rear of the table and havingits free end extending over the board, a screw pin extending from thetop of the table through the clamp and a pressure knob screwed-upon thescrew pin above the clamp as and for the purpose specified.

7. The combination with the table, A, provided with cross bars andpivotally supported upon the spindle, B, having bearings beneath thecross bar upon the upper enlarged end of the vertical single standard,0, the standards, D, D, having cross bars, D, through which thestandard, 0, extends, the bracket, d, forming part of the cross bar, D,the bracket, 0, forming part of the standard, 0, the screw spindlesecured in the bracket, D, and extending through the bracket, 0, andprovided with a hand wheel as and for the purpose specified.

8. The combination with the table, A, provided with cross bars andpivotally supported upon the spindle,B, having bearings beneath thecrossbar upon the upper enlarged end of the vertical single standard, 0, thedouble standards, I), D, supporting the singlestandards in the crossbars, D, extending between them, the slotted stays, F, F, pivotallyconnected to the cross bars, A, and secured to the standards, D, D, bythe thumb screw, (1, 01, extending through the slots as and for thepurpose specified.

9. The combination with the table, A, having the raised ends, A and, Aand a circular opening, a, and circular board, G, rotatably supportedwithin the opening and having its surface flush with the surface of itsraised ends, of the rule, P, extending across the board and raised endsand connected at both ends to cords by depending blocks and meanswhereby the cords are given a uniformity of movement so as to keep therule when being moved parallel to the rear and front of the table as andfor the pnrpose specified.

10. The combination with the table, A, having the raised ends, A and, Aand a circular opening, a, and circular board, G, rotatably supportedwithin the opening and having its surface flush with the surface of theraised ends, of the rule, P, extending across the board and raised endsand connected at both ends to cords by depending blocks, the

cords being endless and extending around front and rear pulleys, 9',and, 0*, and Wound around central pulleys, 0' which are secured at eachend to the common spindle, B, as and for the purpose specified.

11. The combination With thetable,A, with raised ends, A and, A andhaving a circular opening provided With a circular board rotatablysupported and suitably secured therein and havingthe surface flush withthe raised ends, of the tie, P, and the scale, A,

held securel within the longitudinal recess,

With a notched strip of the bar When underneath the tooth as and for thepurpose specified.

13. The combination with the table, A, with raised ends, A and, A andhaving a circular opening provided with a circular hoard rotatablysupported and secured therein, and having the surface flush With theraised ends, of the rule, P, rotatable bar journaled in the recess, a,and provided with longitudinal ratchet-shaped notched strips and grooveslongitudinally arranged, a catch tooth, '1'), depending from the rule,the scale marked collars, s, on the supporting spindle, s, the pointer,.5", knob, 3 toothed wheel, 3, and dog", 8, all arranged as and for thepurpose specified.

SAMUEL JOHN LAUGHLIN. JAMES HOUGII. \Vitnesses:

ROBERT HILL, WM. 0. SMITH, STANLEY FRENCH, HUGH CUTI-IBERTSON.

